| Forums | Register | Polls | Search | Statistics |
 (?)  
You must be logged in to post content on this forum.
Display Calibration Light Illusion Forums / Display Calibration /  
 

ADL-Measurement for ColourSpace (AddOn)

 
 
Page  Page 1 of 2:  1  2  Next »

Author Omardris
ZRO
#1 | Posted: 30 Dec 2021 16:27 
Among projector users there are always hot discussions about ON/Off contrast, ANSI contrast or in-picture contrast.
In contrast to self-luminous displays (TVs), projectors suffer from stray light that occurs in the light path and cannot be avoided completely.
Therefore, projectiondream.com determined the Average Display Luminance (ADL) of various films a few years ago and published a set of measurement images that can be used to measure stray light in the light path.
http://projectiondream.com/en/movie-brightness-adl-contrast-measurements/
So this is not calibration, but measuring projectors and of course it is not a scientific method, but more fun for real nerds.
So I created a small program that uses the remote service of ColourSpace to control the sensor and do the actual measurement. This allows to use all sensors that ColourSpace supports.
The measurement images are stored on a Raspberry Pi3 or Pi4 with PGenerator installed with Ted's Calibration Disk. Supported resolutions are 1920 x 1080 (Pi3) and 3840 x 2160 (Pi4) (16:9).
Here are some printscreens:

ADL4CS

PGenerator

Access is via the Addons page of the website

However, I explicitly point out that ADL measurements can be made on a TV or monitor, but are useless there.
Thank you very much.
Peter

Author Matthias
ZRO
Male
#2 | Posted: 31 Jan 2022 19:42 
I have no projector, but I like the idea of this add-on.

Author Omardris
ZRO
#3 | Posted: 17 Feb 2022 16:23 
Hi,
since I have so much fun tinkering with the little Raspberry and the ingenious PGenerator software, I have finished an executable version of ADL4CS despite the low demand. Yes I know - never say never.

A major reason for continuing to work on the tool was getting permission from Stacey Spears to use the layout of the ADL patterns from the "Spears & Munsil UHD HDR Benchmark Disk".

The installation and use of the tool has been greatly simplified because the ADL measurement images are now generated directly from the PGenerator rather than having to copy image files first.
However, it is still possible for dedicated users to create their own ADL measurement images and use them with the tool.
The tool is free of charge, but still copy-protected by a license file.

PGenerator

Peter

Author Omardris
ZRO
#4 | Posted: 6 Mar 2022 17:57 
Hi,
there is a new ADL4CS version 1.5.4 available via the Addons page, which also supports PGenerator version 1.3 Beta 1/2.

Peter

Author Omardris
ZRO
#5 | Posted: 17 Mar 2022 12:57 
Hi,
here is an example of an ADL4CS measurement with a PGenerator Pi4 and K10A plus diffuser towards the lens of a projector JVC-NZ9 (BT709, D65, Laser low):

ADL4CS and JVC-NZ9

You can see that the JVC-NZ9 shows very good performance in ADL measurement.
Peter

Author Omardris
ZRO
#6 | Posted: 17 Aug 2022 16:11 
Hi,
even if this has nothing to do with ColourSpace anymore, because CS does not support pure luxmeters, I would like to point out that this ADL measurement is now also available for the luxmeters Mavolux 5032 and the Minolta T10A, because they have a USB interface.
ADL for Mavolux - Sample
Peter

Author Omardris
ZRO
#7 | Posted: 7 Dec 2022 17:55 
Hi,
a very fresh version 2 of ADL4CS.
Version 2 is specifically for the Raspberry P4 with the PGenerator 1.3 and higher. It includes a new mask for entering the PGenerator settings which have changed with PGen 1.3:

[imgs=ADL4CS2]ADL4CS Version 2[/imgs]

At the moment I limited the selection of the resolutions to the different frequencies at 1920x1080 and 3840x2160, because all resolutions of my JVC NZ9 were too confusing for me.

The YCbCr422 lim setting automatically forces 10Bit.
RGB full and YCbCr444 lim are always set to 8 bit first for security reasons and then can be increased to 10bit.

The new settings for the PGenerator can be tested without a license.
Since I only have the NZ9 as a true 4k device, it would be interesting to see if it works in other setups.

Of course I realize that these settings are completely unimportant and unnecessary for an ADL measurement and everything would be fine with RGB full and 1080p60, but it was just fun to honor the PGen team's much work by then using their results.
Peter

Author Omardris
ZRO
#8 | Posted: 11 Dec 2022 16:52 
Hi,
there was a bug with the 1 pixel black patch with 10bit and the delay time for reading the resolutions had to be increased, because the modern devices have up to 50 modes.
So now the ADL4CS version 2.0.1 is available.
Peter

Author Omardris
ZRO
#9 | Posted: 17 Jan 2023 17:20 
Hi,
all the best for the new year.
In the meantime version 3 of ADL4CS is ready.

This version supports all PGenerator versions 1.1 - 1.4 and offers different setup options depending on the rPi-PGen combination.
However, PGen version 1.2 on the P3 and version 1.4 on the P4 is recommended.

Additionally a function for uploading and displaying images was added to manage own files independent from DeviceControl.

ADL4CS2

More for fun there is also access to the images of the HCFR directory that is on the PGenerator by default.

ADL4CS2

Peter

Author Omardris
ZRO
#10 | Posted: 12 Feb 2023 10:18 
Current information:
ADL4CS is also compatible with the new PGenerator version 1.5

ADL4CS2
Peter

Author Omardris
ZRO
#11 | Posted: 23 Oct 2023 16:40 
Current information:
ADL4CS is also compatible with the new PGenerator version 1.6
Peter

Author Omardris
ZRO
#12 | Posted: 23 May 2024 14:59 
ADL4CS has been slightly revised and is now available in version 4.

The main changes are:

- Version 4 no longer requires a separate license file, so it is now a free ADDON.

- The somewhat cumbersome function for loading your own ADL images onto the PGenerator has been removed.

- The "Screenshot" option for saving the ADL4CS window is new.
If this option is active, the ADL4CS window is copied to the clipboard after each measurement or series of measurements.
The image is then available there for other applications.
If the save function is used, an image file (.bmp) with the same name is saved in addition to the csv file when the screenshot option is active.
This makes it very easy to publish the measurement results in a clear format.

So that Steve doesn't have to change the link, I have simply saved the new version 4 to the cloud under the old name "ADL4CS3.zip".
Peter

Unfortunately, GoogleDrive identifies the installation program for ADL4CS version 4 as being infected with a virus.

Author Steve

INF
Male
#13 | Posted: 23 May 2024 19:31 
Cheers Peter!
Appreciate not having to change the link!

https://www.lightillusion.com/addons.html

Steve
Steve Shaw
Mob Boss at Light Illusion

Author Omardris
ZRO
#14 | Posted: 25 May 2024 09:58 
Hi,
Unfortunately, ADL4CS version 4 cannot be downloaded from Google Drive at the moment because the setup program triggers a virus suspicion.
This is a false positive of the heuristics and therefore I have requested a review from Google. But that will take some time.
It cannot be ruled out that other virus scanners will also issue a warning. Programs in C and C++ are quite unpopular there.
The current version of the AVIRA scanner also accepts version 4.
As an alternative I can offer the following link:
https://magentacloud.de/s/PG7PDjQcCSbwswi
Peter

Author Omardris
ZRO
#15 | Posted: 29 May 2024 15:39 
Some users of ADL4CS version 3 have asked me to include the screenshot function in version 3 as well.
So here is the link to ADL4CS version 3.1, which includes rpi file management but requires a license file.
https://magentacloud.de/s/7QcYe7T8pPrPgCg
Peter

PS: Unfortunately, Google has not yet reacted and released the download of ADL4CS on Google Drive.

Page  Page 1 of 2:  1  2  Next » 
You must be logged in to post content on this forum.
Display Calibration Light Illusion Forums / Display Calibration /
 ADL-Measurement for ColourSpace (AddOn)

 

 
 
Online now: Guests - 1
Members - 0
Max. ever online: 192 [11 Jan 2023 08:39]
Guests - 192 / Members - 0